13545121200 has 120 divisors (see below), whose sum is σ = 46727248848. Its totient is φ = 3334179840.

The previous prime is 13545121181. The next prime is 13545121201. The reversal of 13545121200 is 212154531.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (13545121201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 418539 + ... + 449738.

Almost surely, 2^13545121200 is an apocalyptic number.

13545121200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13545121200 is an abundant number, since it is smaller than the sum of its proper divisors (33182127648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13545121200 is a wasteful number, since it uses less digits than its factorization.

13545121200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868311 (or 868300 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 13545121200 its reverse (212154531), we get a palindrome (13757275731).

It can be divided in two parts, 135451 and 21200, that added together give a palindrome (156651).

The spelling of 13545121200 in words is "thirteen billion, five hundred forty-five million, one hundred twenty-one thousand, two hundred".